8a5aaf97cc
core/ cBPF-JIT : TODO |
core/ eBPF-JIT : TODO |
core/ generic-idle-thread : ok |
core/ jump-labels : TODO |
core/ tracehook : ok |
debug/ KASAN : TODO |
debug/ gcov-profile-all : TODO |
debug/ kgdb : TODO |
debug/ kprobes-on-ftrace : TODO |
debug/ kprobes : TODO |
debug/ kretprobes : TODO |
debug/ optprobes : TODO |
debug/ stackprotector : TODO |
debug/ uprobes : TODO |
debug/ user-ret-profiler : TODO |
io/ dma-contiguous : ok |
locking/ cmpxchg-local : TODO |
locking/ lockdep : TODO |
locking/ queued-rwlocks : ok |
locking/ queued-spinlocks : TODO |
locking/ rwsem-optimized : TODO |
perf/ kprobes-event : TODO |
perf/ perf-regs : TODO |
perf/ perf-stackdump : TODO |
sched/ membarrier-sync-core : TODO |
sched/ numa-balancing : .. |
seccomp/ seccomp-filter : TODO |
time/ arch-tick-broadcast : TODO |
time/ clockevents : ok |
time/ context-tracking : TODO |
time/ irq-time-acct : TODO |
time/ modern-timekeeping : ok |
time/ virt-cpuacct : TODO |
vm/ ELF-ASLR : TODO |
vm/ PG_uncached : TODO |
vm/ THP : .. |
vm/ batch-unmap-tlb-flush: TODO |
vm/ huge-vmap : TODO |
vm/ ioremap_prot : TODO |
vm/ numa-memblock : .. |
vm/ pte_special : TODO |
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
58 lines
1.9 KiB
Plaintext
58 lines
1.9 KiB
Plaintext
#
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# Feature name: membarrier-sync-core
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# Kconfig: ARCH_HAS_MEMBARRIER_SYNC_CORE
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# description: arch supports core serializing membarrier
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#
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# Architecture requirements
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#
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# * arm/arm64
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#
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# Rely on implicit context synchronization as a result of exception return
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# when returning from IPI handler, and when returning to user-space.
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#
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# * x86
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#
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# x86-32 uses IRET as return from interrupt, which takes care of the IPI.
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# However, it uses both IRET and SYSEXIT to go back to user-space. The IRET
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# instruction is core serializing, but not SYSEXIT.
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#
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# x86-64 uses IRET as return from interrupt, which takes care of the IPI.
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# However, it can return to user-space through either SYSRETL (compat code),
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# SYSRETQ, or IRET.
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#
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# Given that neither SYSRET{L,Q}, nor SYSEXIT, are core serializing, we rely
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# instead on write_cr3() performed by switch_mm() to provide core serialization
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# after changing the current mm, and deal with the special case of kthread ->
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# uthread (temporarily keeping current mm into active_mm) by issuing a
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# sync_core_before_usermode() in that specific case.
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#
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-----------------------
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| arch |status|
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-----------------------
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| alpha: | TODO |
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| arc: | TODO |
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| arm: | ok |
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| arm64: | ok |
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| c6x: | TODO |
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| csky: | TODO |
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| h8300: | TODO |
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| hexagon: | TODO |
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| ia64: | TODO |
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| m68k: | TODO |
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| microblaze: | TODO |
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| mips: | TODO |
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| nds32: | TODO |
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| nios2: | TODO |
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| openrisc: | TODO |
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| parisc: | TODO |
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| powerpc: | TODO |
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| riscv: | TODO |
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| s390: | TODO |
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| sh: | TODO |
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| sparc: | TODO |
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| um: | TODO |
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| unicore32: | TODO |
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| x86: | ok |
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| xtensa: | TODO |
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-----------------------
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